> Markdown version of [/jobs/ext/2277939-network-security-engineer](https://www.wearedevelopers.com/jobs/ext/2277939-network-security-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Security Engineer - **Company:** ClearRoute - **Location:** London, UK - **Salary:** £66,619.0 - **Contract:** Permanent contract - **Skills:** Microsoft Access, Access Network, Bash Shell, Cisco PIX, Computer Networks, DDoS Mitigation, Network Address Translation, Intrusion Detection Systems, Python (Programming Language), Network Security, Automation of Marketing, Network Segmentation, PCI Data Security Standards, Windows PowerShell, Remote Access Technology, Ansible, Zero Trust Network Access, Web Application Security, Systems Integration, Firewalls (Computer Science), Infrastructure Automation Frameworks, SDN Network, Palo Alto Networks, Fortinet, Cloud Migration, CIS Benchmarks, Api Design, Firepower, Terraform, Security Orchestration, Automation & Response - **Published:** August 28, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5857802309 ## About the Role AlgoSec & Security Policy Management * Hands-on experience administering and supporting the AlgoSec Security Management Suite, including: Firewall Analyser, FireFlow, ObjectFlow, AppViz. * Experience utilising AlgoSec to automate firewall policy management, risk analysis, access recertification, change governance, and compliance reporting. * Strong understanding of application connectivity mapping, traffic flow analysis, and security policy optimisation. Firewall & Network Security Technologies * Extensive experience managing large-scale, multi-vendor firewall environments, including: Palo Alto Networks, Fortinet, Cisco ASA / Firepower, Check Point. * Strong understanding of firewall architecture, policy administration, NAT, VPN technologies, segmentation, and micro-segmentation. * Experience performing firewall rule reviews, recertification exercises, policy optimisation, and risk reduction initiatives. * Knowledge of network access controls, intrusion prevention systems (IPS), intrusion detection systems (IDS), DDoS protection, and secure web gateway technologies. Network Security Operations * Strong operational experience supporting enterprise network security environments. * Experience managing security incidents, firewall requests, policy exceptions, and operational support within regulated organisations. * Understanding of firewall compliance management, governance processes, audit requirements, and regulatory controls. * Experience working within ITIL-aligned Incident, Problem, Change, and Service Management frameworks. Security Automation & Engineering * Experience automating network security processes, including; Firewall rule lifecycle management, Policy validation, Compliance reporting, Security control enforcement, Operational workflows. * Proficiency in PowerShell, Python, Bash, and API-based integrations to support automation objectives. * Experience with automation platforms and configuration management tools such as Ansible, Terraform, Chef, or equivalent solutions. Additional Professional Competencies * Strong stakeholder management and relationship-building skills across technical and executive audiences. * Ability to influence and drive security improvements across infrastructure, cloud, engineering, and operational teams. * Strong analytical approach to risk identification, remediation, and operational optimisation. * Excellent written and verbal communication skills with the ability to present complex technical issues in a clear and concise manner. * Demonstrated ability to balance security, operational resilience, regulatory obligations, and business requirements. Additional Desirable Skills & Experience * Experience implementing enterprise firewall governance programmes using AlgoSec or equivalent policy management platforms. * Experience with Zero Trust Network Architecture (ZTNA), SASE, and Security Service Edge (SSE) technologies. * Experience within large-scale financial services, banking, or other highly regulated environments. * Knowledge of regulatory frameworks including PCI-DSS, ISO27001, NIST Cyber Security Framework, CIS Controls, and relevant financial industry regulations. * Experience supporting network security transformation, cloud migration, and hybrid networking programmes. * Familiarity with software-defined networking (SDN), network segmentation strategies, and modern secure connectivity solutions. ## Description ClearRoute is looking for a Network Security Engineer to take ownership of firewall policy management and network security operations across our client estate, with AlgoSec at the centre of the toolset. You'll be the go-to specialist for administering the AlgoSec Security Management Suite, using it to automate policy governance, risk analysis, and compliance reporting across large, multi-vendor firewall environments. This is a hands-on engineering role. You'll work directly within regulated, enterprise-scale environments, reviewing and optimising firewall rule bases, running recertification exercises, and building the automation that takes manual, error-prone policy work off engineering teams' plates. You'll sit at the intersection of security engineering, operations, and governance, translating firewall and network security requirements into practical, auditable controls that hold up under regulatory scrutiny. Alongside the technical delivery, you'll be a trusted voice with both technical and executive stakeholders identifying where security posture, operational resilience, and business need are in tension, and helping clients navigate that trade-off with clear, well-reasoned recommendations. ## Related Videos - [Dev & Test in the Cloud? 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